GTA Material Co., LTD.
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A. Liquid Materials B. Thermal Pad C. Thermal / Composite Materials D. Optically Clear Adhesives E. Semiconductor Tape
C. Thermal / Composite Materials
C. Thermal / Composite Materials

Structural Adhesive

GTA's STIFBOND™ structural adhesive series is developed for bonding applications in precision electronics, optical modules, metal structures, and dissimilar materials. It offers versatile material solutions, including UV/thermal dual curing, low-temperature thermal curing, toughened thermal curing, and rapid room-temperature curing.
Core Technical Advantages
1 High-Strength Bonding
Distributes localized loads, reduces stress concentration, and improves structural bond stability.
2 Vibration & Impact Resistance
Addresses mechanical loads in enclosures, heat-dissipation modules, and electronic equipment.
3 Dissimilar Material Bonding
Suitable for metals, FR-4, engineering plastics, and composite substrates.
4 Process Integration
Supports precision dispensing, UV pre-fixation, thermal curing, and room-temperature assembly.
Four Structural Adhesive Material Platforms
Find the right material platform based on processing conditions and application requirements.
01
Fast Assembly Platform
Fast Assembly
BH-K36X
Chemistry
Two-Component Acrylic (2K Acrylic)
Process / Key Features
Rapid room-temperature curing
Target Applications
Metal enclosures, brackets, and structural reinforcements
Design Objective
Shorter assembly time and greater production efficiency
02
Low-Temperature Curing Platform
Low-Temp Precision
CF-I36R
Chemistry
One-Component Acrylic (1K Acrylic)
Process / Key Features
Low-temperature thermal curing; precision dispensing
Target Applications
PCBs, heat-sensitive electronic components, and compact precision modules
Design Objective
Reduced thermal load and improved dispensing precision
03
Active Alignment Platform
Active Alignment
GF-736S
Chemistry
Dual-Cure Epoxy Acrylate
Process / Key Features
UV pre-fixation in seconds, followed by thermal post-curing
Target Applications
Optical communication modules, CPO/FAU, and precision lenses
Design Objective
Low shrinkage and dimensional stability
04
High-Toughness Structural Platform
High Robustness
CF-JB6Q
Chemistry
Toughened Acrylic
Process / Key Features
High shear strength, non-sag properties, and thermal curing
Target Applications
Large dissimilar-material structures, heat-dissipation and power modules
Design Objective
Improved vibration resistance and bond reliability
Product Selection Guide
Select products by curing method and key application requirements. Refer to each product specification for detailed material properties.
GF-736S
1K (single-component)
Curing Method
UV + Thermal Dual Curing
Key Features
Optical alignment, low shrinkage, dimensional stability
Typical Applications
Precision camera lenses / CPO-FAU
CF-I36R
1K (single-component)
Curing Method
Low-temperature thermal curing
Key Features
Low thermal load, precision dispensing
Typical Applications
PCB / image sensor modules
CF-JB6Q
1K (single-component)
Curing Method
Thermal curing
Key Features
High toughness, non-sag properties, dissimilar-material bonding
Typical Applications
Heat sinks / industrial metal structures
BH-K36X
2K (two-component)
Curing Method
Room-temperature curing
Key Features
Fast assembly, vibration resistance, impact resistance
Typical Applications
Metal enclosures / composite materials
Structural Adhesives | Technical Specifications
Key characteristics, applications, and material specifications are organized by product model. Refer to the latest technical data sheet (TDS) for actual processing conditions.
GF-736S ｜ Structural Adhesive for Optical Alignment
UV + Thermal Dual Cure | Active Alignment
STIFBOND™ GF-736S is a one-component acrylic structural adhesive with dual UV and thermal curing. It is designed for precision active optical alignment, lens fixation, and bonding of precision electronic components. UV exposure provides rapid pre-fixation, while subsequent thermal curing helps achieve complete curing in shadowed areas.
Material Features
•Rapid UV pre-fixation within seconds reduces the risk of positional shift after alignment.
•Secondary thermal curing improves cure completeness in shadowed areas.
•Designed for low shrinkage, high dimensional stability, and low outgassing.
•Controlled rheology suitable for precision syringe dispensing and automated equipment.
Typical Applications
•Active optical alignment of automotive and consumer camera modules.
•Bonding of optical lenses, lens elements, and precision optical components.
•Alignment and fixation of CPO/FAU fiber-array units for optical communications.
Key Technical Specifications
Chemical System
Acrylic
Composition
One-component (1K)
Appearance
Off-white
UV Pre-fixation
365 nm；1,000 mW/cm²；3 s
Thermal Cure
100°C × 30 min or 120°C × 30 min
Viscosity @25°C
74 Pa·s
Shore Hardness
Shore D 89
Product & Application Gallery
GF-736S Product Appearance
GF-736S Structural Adhesive Product Appearance
Precision Optical Alignment Application
GF-736S Precision Optical Alignment and Optical Communications Application
Active Precision Optical Alignment | UV Pre-fixation & Thermal Cure
GF-736S is suitable for active alignment in precision optical assembly. Rapid UV pre-fixation holds the aligned position, followed by thermal curing to enhance bonding and assembly stability.
GF-736S Active Optical Alignment, UV Pre-fixation, and Thermal Cure Illustration
Active Alignment → UV Pre-Fix → Final Bonding (Thermal Cure)
Detailed Technical Data
Material & Curing Properties
Chemical System
Acrylic
Composition
1K
Appearance
Off-white
Specific Gravity
1.73
Viscosity @25°C
74 Pa·s
UV Pre-fixation
365 nm／1,000 mW/cm²／3 s
Thermal Cure
100°C × 30 min; or 120°C × 30 min
Shore Hardness
Shore D 89
Coefficient of Thermal Expansion (CTE)
23
Boiling-Water Absorption
0.16%
Bonding Performance (Shear Strength)
Glass / Glass
>12.5 MPa
Ni / Ni
>12.5 MPa
Steel / Steel
>12.5 MPa
Al / Al
>12.5 MPa
Ni / PCB
>12.5 MPa
Reliability Test Conditions
85°C／85%RH
1,000 h
High-Temperature Storage @150°C
1,000 h
Thermal Cycling: −40 to 150°C
1,000 cycles
Packaging & Storage30 mL / 50 mL syringes and customized packaging. Store sealed at 0–5°C. Allow the sealed container to reach room temperature before use to prevent condensation contamination.
CF-I36R ｜ Low-Temperature Curing Structural Adhesive
One-Component Low-Temperature Thermal Cure
STIFBOND™ CF-I36R is a one-component, low-temperature thermally cured acrylic structural adhesive developed for precision electronic components, optical imaging modules, and heat-sensitive electronic devices. It combines a lower curing temperature with dimensional stability and compatibility with precision dispensing processes.
Material Features
•Low-temperature curing at 80°C reduces the thermal load on electronic components.
•Suitable for bonding metals, FR-4, and electronic packaging materials.
•Designed for low shrinkage, dimensional stability, and low outgassing.
•Suitable for automated precision dispensing and electronic assembly.
Typical Applications
•Fixation of CCD/CMOS image sensor modules.
•Assembly of PCBs, memory cards, and compact electronic modules.
•IC package edge reinforcement and precision metal-frame fixation.
Key Technical Specifications
Chemical System
Acrylic
Composition
One-component (1K)
Appearance
Black
Thermal Cure
80°C × 60 min
Specific Gravity
1.6
Hardness
Shore D 80
Coefficient of Thermal Expansion (CTE)
39
Product & Application Gallery
CF-I36R Product Appearance
CF-I36R Structural Adhesive Product Appearance
Precision Electronic Assembly Application
CF-I36R Precision Electronic Assembly Application
Detailed Technical Data
Material & Curing Properties
Chemical System
Acrylic
Appearance
Black
Composition
1K
Specific Gravity
1.6
Thermal Cure
80°C × 60 min
Shore Hardness
Shore D 80
Coefficient of Thermal Expansion (CTE)
39
Boiling-Water Absorption
0.16%
Bonding Performance (Shear Strength)
Glass / Glass
>12.5 MPa
Steel / Steel
>12.5 MPa
Reliability Test Conditions
85°C／85%RH
1,000 h
High-Temperature Storage @150°C
1,000 h
Thermal Cycling: −40 to 150°C
1,000 cycles
Packaging & Storage30 mL / 50 mL syringes and customized packaging. Store sealed at 0–5°C. Allow the sealed container to reach room temperature before use to prevent condensation contamination.
CF-JB6Q ｜ High-Toughness Thermally Cured Structural Adhesive
High Shear Strength / Non-Sag | Robust Structural Bonding
STIFBOND™ CF-JB6Q is a one-component, high-toughness acrylic structural adhesive designed for high-strength bonding of metals and dissimilar substrates. It offers high shear strength, good peel toughness, and non-sag properties for electronic equipment, thermal modules, and precision industrial assemblies.
Material Features
•High shear strength and good peel toughness.
•Thixotropic, non-sag behavior for localized dispensing and vertical applications.
•Suitable for aluminum, copper, steel, and glass-fiber-reinforced plastics.
•Suitable for structural bonding of materials with different thermal expansion coefficients.
Typical Applications
•Aluminum heat sinks and metal brackets; copper plates and aluminum-alloy structures.
•Metal structural reinforcement in servers, networking equipment, and industrial electronic modules.
•Metal-to-FRP bonding and structural fixation in vibration-prone applications.
Key Technical Specifications
Chemical System
Acrylic
Composition
One-component (1K)
Appearance
Gray
Thermal Cure
120°C × 60 min
Shore Hardness
Shore D 82
Coefficient of Thermal Expansion (CTE)
40
Boiling-Water Absorption
0.16%
Product & Application Gallery
CF-JB6Q Product Appearance
CF-JB6Q Structural Adhesive Product Appearance
CF-JB6Q Application
CF-JB6Q High-Toughness Structural Adhesive Application
Detailed Technical Data
Material & Curing Properties
Chemical System
Acrylic
Appearance
Gray
Composition
1K
Curing Mechanism
Thermal Cure
Thermal Cure
120°C × 60 min
Shore Hardness
Shore D 82
Coefficient of Thermal Expansion (CTE)
40
Boiling-Water Absorption
0.16%
Bonding Performance (Shear Strength)
Ni / FR-4
>12.5 MPa
Ni / Ni
>12.5 MPa
Steel / Steel
>12.5 MPa
Al / Al
>12.5 MPa
Reliability Test Conditions
85°C／85%RH
1,000 h
High-Temperature Storage @150°C
1,000 h
Thermal Cycling: −40 to 150°C
1,000 cycles
Packaging & Storage300 mL cartridges, 1 L / 4 L containers, and customized packaging. Store sealed at 0–5°C.
BH-K36X ｜ Fast Room-Temperature Curing Structural Adhesive
Two-Component Room-Temperature Cure | Structural Bonding
STIFBOND™ BH-K36X is a two-component methacrylate structural adhesive that cures chemically at room temperature to form high-strength bonds on metals, engineering plastics, and fiber-reinforced composites. Here, “cold welding” refers to room-temperature adhesive bonding, not metal fusion or metallurgical welding.
Material Features
•Two-component room-temperature cure without high-temperature baking.
•Good adhesion to metals, engineering plastics, and dissimilar materials.
•Working time: 3–5 min; initial fixture time: ≤10 min.
•Designed for impact, vibration, and fatigue resistance.
Typical Applications
•Structural bonding of metal housings for laptops, tablets, and industrial electronics.
•Fixation of speaker magnets and metal structures.
•Dissimilar-material bonding: metal/FRP, metal/ABS, and FRP/engineering plastics.
Key Technical Specifications
Chemical System
Methacrylate (2K)
Composition
Two-component (2K)
Mixing Ratio by Volume (A:B)
1:1
Working Time @23°C
3～5 min
Initial Fixture Time @23°C
≤10 min
Functional Cure @23°C
≤60 min
Full Cure @23°C
24 h
Product & Application Gallery
BH-K36X Product Appearance
BH-K36X Two-Component Structural Adhesive Product Appearance
BH-K36X Application
BH-K36X Room-Temperature Curing Structural Adhesive Application
Detailed Technical Data
Uncured Material Properties
Part A Appearance
Off-white Paste
Part B Appearance
Blue Paste
Mixing Ratio by Volume (A:B)
1:1
Part A Viscosity @25°C
100～150 Pa·s
Part B Viscosity @25°C
100～150 Pa·s
Mixed Density @25°C
0.95～1.05 g/cm³
Working Time @23°C
3～5 min
Initial Fixture Time @23°C
≤10 min
Functional Cure @23°C
≤60 min
Full Cure @23°C
24 h
Cured Physical Properties (23°C / 24 h)
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